Upsets rock Wimbledon on Day 3

Roger Federer of Switzerland grimaces during a press conference after his defeat to Sergiy Stakhovsky of Ukraine in a Men's second round singles match at the All England Lawn Tennis Championships, Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/AELTC, Thomas Lovelock)

Sergiy Stakhovsky of Ukraine reacts as he wins against Roger Federer of Switzerland in their Men's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Anja Niedringhaus)

Roger Federer of Switzerland, back, looks to Sergiy Stakhovsky of Ukraine after he lost in their Men's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Anja Niedringhaus)

Roger Federer of Switzerland waves to the crowd as he walks off the court after his defeat to Sergiy Stakhovsky of Ukraine in their Men's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Anja Niedringhaus)

Caroline Wozniacki of Denmark receives treatment during an injury break as she plays Petra Cetkovska of the Czech Republic during their Women's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Kirsty Wigglesworth)

Maria Sharapova of Russia is attended to by a physiotherapist during her Women's second round singles match against Michelle Larcher De Brito of Portugal at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Anja Niedringhaus)

Maria Sharapova of Russia slips on the court during her Women's second round singles match against Michelle Larcher De Brito of Portugalat the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Anja Niedringhaus)

Maria Sharapova of Russia speaks during a news conference following her defeat in a Women's second round singles match to Michelle Larcher De Brito of Portugal at the All England Lawn Tennis Championships, Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/AELTC, Chris Raphael)

Michelle Larcher De Brito of Portugal reacts after beating Maria Sharapova of Russia during their Women's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Anja Niedringhaus)

Michelle Larcher De Brito of Portugal reacts after winning a point against Maria Sharapova of Russia during their Women's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Anja Niedringhaus)

Sloane Stephens of the United States reacts after beating Andrea Petkovic of Germany in a Women's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Kirsty Wigglesworth)

Sloane Stephens of the United States returns to Andrea Petkovic of Germany during their Women's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Kirsty Wigglesworth)

Dustin Brown of Germany volleys a return to Lleyton Hewitt of Australia during their Men's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Kirsty Wigglesworth)

Ernests Gulbis of Latvia serves to Jo-Wilfried Tsonga of France in their Men's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Alastair Grant)

Britain's Andy Murray returns to Lu Yen-Hsun of Taiwan during their Men's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Sang Tan)

Lleyton Hewitt of Australia wipes his forehead as he plays Dustin Brown of Germany during their Men's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Kirsty Wigglesworth)

Caroline Wozniacki of Denmark falls on court as she plays Petra Cetkovska of the Czech Republic during their Women's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Kirsty Wigglesworth)

Eugenie Bouchard of Canada celebrates after beating Ana Ivanovic of Serbia in a Women's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Alastair Grant)

Petra Cetkovska of the Czech Republic reacts after beating Caroline Wozniacki of Denmark in their Women's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Kirsty Wigglesworth)

John Isner of the United States, right, is attended to before retiring injured from his Men's second round singles match against Adrian Mannarino of France at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Alastair Grant)